| Momentum |
Alright so i have the ls/vtec swap... everything was good this morning. Still pulled hard. After work my battery was dead, had to boost it (fucking headlights)
Ever since then my car has no power? I cant tell if its any different in the lower rpm's because i haven't had it long, but after 4-5000 rpms it seems like there is just nothing. It still seems to rev quickly, but no power to the wheels. I can hear the VTEC at 5500 rpms, but still the car just has no go. Engine definately isnt as loud.
Now i dont know if it has anything to do with the battery dying, but i cant think of anything. I didnt build the motor and dont know all that much about the ls/vtec swap. I just figured the battery dying could have screwed up the ecu? :dunno:
Fuel pressure is at 32 at idle, 40 when i give it gas....
Also it took a little while to start? Cranked for about 10 seconds then started fine... Im kinda scared to start it again right now |
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| anschutz_93 |
| just the ecu reset and has to re-calibrate... when I disconnect my battery the car doesn't run right for a week. |
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| khooper |
sounds like the tranny is slipping. better get it to a shop to look at quickly before you cause more costly damage.
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Autopartswarehouse |
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| GOT SE-R |
quote:
Originally posted by anschutz_93
just the ecu reset and has to re-calibrate... when I disconnect my battery the car doesn't run right for a week.
x2
My 95' 200SX was the same way when it had all the mods on it. I had to atleast put 150km on it before it calibrated to run efficiently with the mods. |
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| Momentum |
So I should just keep driving it?
... scary :blink: |
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| anschutz_93 |
quote:
Originally posted by Momentum
So I should just keep driving it?
... scary :blink:
If its the clutch you would go from 3000-7000 pretty damn quick, and it makes an awesome whirling noise... kinda like spinning your tires but a little different. Since you didn't say anything about this noise that you would of surely noted, my bet is that your car is just pulling timing on the upper rev ranges. Your idle is probably a little off too, is it not? Drive it around, it should return to normal pretty quick. |
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| Momentum |
quote:
Originally posted by anschutz_93
If its the clutch you would go from 3000-7000 pretty damn quick, and it makes an awesome whirling noise... kinda like spinning your tires but a little different. Since you didn't say anything about this noise that you would of surely noted, my bet is that your car is just pulling timing on the upper rev ranges. Your idle is probably a little off too, is it not? Drive it around, it should return to normal pretty quick.
Well i just noticed a sort of whistling sound, at first i thought it was the sound of the air intake but its something different. Only hear it at idle and when acceleratign to about 3k.
Ive driven 30 KMs and still the same?
Like i said before it feels seems like everything should be fine, the RPM needle seems to be accelerating at the right speed, just when you hit over 4000 rpms it doesnt seem like im getting the high-rev power i should be. It almost feels like the engine is getting the power its just not being transferred to the wheels, but at the same time the engine isnt nearly as powerful sounding.
I also noticed i dont have much power until about 2500 rpms, at that stage i can feel the car getting a lot more power, but then the rpms just goes up and its not as powerful as it should be.
Its kind of hard to explain, you'd need to be driving it to understand.
If it was the tranny/clutch would it just happen all of a sudden like that? |
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| Perilous_Enterprises |
Get it into a shop and do a load test on the batt and charging system. I've seen it before, after a battery goes flat, the regulator in the altenator fries when it tries to recharge. This would leave you in a "less power than normal" situation because the charging system can't provide enough enregy to the coil for an efficient spark.
Let this be a lesson (if the charging sys is the prob) to NEVER recharge a flat battery on the altenator. Use a batt charger.... |
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| Momentum |
| So should i just take the alternator off and get it tested at Shitty tire or Part source or something? |
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| Jayturbo |
something to consider, try making sure everything is grounded properly and battery terminals are very tight and clean.
Try it, trust me, and maybe even add some external grounds just incase. |
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| Perilous_Enterprises |
quote:
Originally posted by Momentum
So should i just take the alternator off and get it tested at Shitty tire or Part source or something?
I don't think an altenator can be tested out of the car. Try giving them a call first to find out, but I'm pretty sure you'll have to take your ride in. |
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| Ruiner |
quote:
Originally posted by Perilous_Enterprises
I don't think an altenator can be tested out of the car. Try giving them a call first to find out, but I'm pretty sure you'll have to take your ride in.
usually how it works.. they attach their meter on the battery, then watch the voltage while its running.. if it drops its the alternator as it wouldnt be charging properly.. |
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| Jayturbo |
quote:
Originally posted by Perilous_Enterprises
I don't think an altenator can be tested out of the car. Try giving them a call first to find out, but I'm pretty sure you'll have to take your ride in.
Ummm... yeah then how would they test it...?
They put a volt meter on the battery, 12v system should charge around 13.7 volts. |
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| Perilous_Enterprises |
| they test it by running the car and seeing how much charge the altenator produces. You can't just spin the altenator and get a charge, it has to be powered by the battery.... |
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| Jayturbo |
quote:
Originally posted by Perilous_Enterprises
they test it by running the car and seeing how much charge the altenator produces. You can't just spin the altenator and get a charge, it has to be powered by the battery....
What the fuck? lol
Spinning the alternator generates power... for the battery.
You could spin it and create power off the car. |
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| Perilous_Enterprises |
Dude, get an education.
It's an electromagnet inside the altenator. Unlike a Generator which uses a fixed magnet. If you do not apply power to the rotor the altenator will not produce a charge.
When you disconnect the battery when the car is running, the altenator produces enough current to power the rotor. There is a Zener Diode inside the regulator which redirects current to allow this to happen. |
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| Momentum |
My negative battery cable is a little loose, tightened asll the way but still doesnt grab the post very tightly on the small battery.
I went to canadian tire and bought a new terminal, havent replaced it yet but i dont think thats the problem because its pretty tight. |
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| STiPWR |
quote:
Originally posted by Perilous_Enterprises
Dude, get an education.
It's an electromagnet inside the altenator. Unlike a Generator which uses a fixed magnet. If you do not apply power to the rotor the altenator will not produce a charge.
When you disconnect the battery when the car is running, the altenator produces enough current to power the rotor. There is a Zener Diode inside the regulator which redirects current to allow this to happen.
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| Momentum |
| At canadian tire you bring your alternator (not in the car) and they hook it up to some machine and it runs a bunch of different tests on it, not sure quite how it works but it spins and tells you if its good or bad in so many different tests. |
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| Jayturbo |
quote:
Originally posted by Perilous_Enterprises
Dude, get an education.
It's an electromagnet inside the altenator. Unlike a Generator which uses a fixed magnet. If you do not apply power to the rotor the altenator will not produce a charge.
When you disconnect the battery when the car is running, the altenator produces enough current to power the rotor. There is a Zener Diode inside the regulator which redirects current to allow this to happen.
Dude, read what I wrote, you could test it off the car by spinning the alternator, and I never said battery wouldnt have been needed. |
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| Perilous_Enterprises |
quote:
Originally posted by Jayturbo
What the fuck? lol
Spinning the alternator generates power... for the battery.
You could spin it and create power off the car.
According to this, you're saying the alternator generates current without the assistance of the battery... perhaps I misread, perhaps you didn't provide enough info. Either way, without power to the rotor, an alternator will not produce a current. |
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